I think you're right about it being a sound issue because there's one shard I that will only play if I DISABLE (unticked the "enable" box) the sound in the Audio Tab. I'm not sure if it's a Mac specific issue or a Wine/Mac compatibility issue and it does seem to depend on which graphic card your Mac has.If you're giving someone the "iTunes advice" you can tell them that all they need to do is open iTunes and then close its window using the red dot. This doesn't actually quit iTunes and you will see that its icon (in the dock) still has a dot underneath it showing it's still running in the background.